Exchange traded funds tracking silver and oil were among the steepest decliners in the commodity complex Tuesday as higher margin requirements and lingering questions about the Federal Reserve’s bond buying program rocked the ETFs.
The iShares Silver Trust was down nearly 5% in afternoon trading Tuesday on volume of about 140 million shares. CME Group late Monday raised margin requirements for Comex silver futures, the third such hike in about a week..............................................Full Article: Source